Method and apparatus for duplicating typewriting



Y Mamh 26,1929. H.HARRIS I ,706,666

METHOD AND APPARATUS FOR DUPLICATING TYPEWRITING Original Filed F eb.25,1926 2 Shee ts-Sheet- 1 Qwuwntov March 26, 1929. w, H, HARms1,706,666

METHOD AND APPARATUS FOR DUPLIGATING TYPEWRITING Original Filed Feb. 25,1926' 2 Sheets-Sheet. 2

gmntot MLTE HHHQP/a I 15 the t pewriter with a duplicating sheet, one ofthe. sheets Patented Mar. 26, 1929. v

UNITED STATES:

PA E ryjb -rlfcE WALTER HENRY HARRIS, or roar ELIZABETH, soU'rn; AFRICA,assrdn'on or ema- HALF TO WALTER n. numrnm, or PORT ELIZABETH, scumAFRICA.

mmnon AND APPARATUS ron'nurmcarme ryrnwmrma,

Application filed February 1926, semi No. 90,694. Renewed m" 31, 2

This invention relates to a method and apparatus for duplicatingtypewrit-ing.

An important object of the invention is to provide a method ofduplicating typewrit- 5 ing wherein the usual carbon'duphcat ng sheetsurrounds the typewriter platen to 1111- press the letters or charactersof the typewriter against the rear face of a th n transparent sheet ofpaper arranged rearwardly of the original sheet. j A further object isto prov de a supporting device having a spindleadapted be received in apaper roll comprising a pair of sheets arranged face to face, the platenof being provided on its face of a er bein relatively thin and transparnti and adagted to pass around the platen and contact with theduplicating sheet thereon. I p

A still further object 1s to provide a noyel form of paper roll. supportng means 1neluding a combined sheet gulde and severing device to permitthe continuous sheet f paper from the roll to be torn into individualsheets afterthe typewritlng'thereon is completed. y A still furtherobject is to provide a paper roll supporting device of the abovementioned character including a guide bar and a cutting bar arrangedadjacent each other and slightly spaced to permit the passage of papertherebetween, sald bars' 'bemg pivotally connected to the supportingmember at one end to permit them to be swung upwardly.,

Other objects and advantages of the in vention will become apparentduring the course of the following escrlption.

In the drawings I have shown one embodiment of the invention. In thisshowlng:

Figure 1 is a side elevation of a typewriter showing the inventionapplied.

Figure 2 is a detail vertical sect-ronalview throu h the paper roll andsupporting device there or,

Figure 3 is a front elevation of the attachment, i Figure 4 is aperspectlve view ofthe same, Figure 5 is a detail sectional VIGW on line5-5 of Figure 3,

Figure 6 is a fragmentary perspeqfi ve of the platen with'portions ofthe paper-sheets passed thereabout, Figure 7 is a similar view of thepaper roll spindle and one of the end'flanges there- I of, and.

Figure 8 is a detailsectional view on line I .88ofFigure 3. v 1

Referring 'to the drawings the numeral 10 designates a typewriter of theusual con-' struction having a carriage 11 and platen 12. Thecarriage'is provided adjacent its rear edge with the usual upstandingpaper table 13 having a curled upper edge 14 which terminates at pointsspaced from the ends of the paper table. The elements just described areparts of the usual standard typewriters and form no part of the'presentinvention. Referring to Figure 6, the platen 12 is surroundedsubstantially throu hout its length by a duplicating sheet 15. Thissheet may be formed. of any suitable material, and may be in. the formof the usual carbon sheets now inter osed between sheets oftypewriterpaper or impressing duplicates of the type-' writer characters upon thesecond and successive sheets of paper. When carbon paper is used as thedu licatin'g element, the'paper may be wrappe aboutthe platen and may besecured thereto in any suitable manner such as by adhesives. g Referringto Figures 1 to 4 inclusive, the numeral 16 designates a paper rollsupport. ing means as a whole including a horizontal rear rail 17 havingend portions 18 thereof turned downwardly and rearwardl to form clipsand the end portions 13 of he paper table are adapted 'to befrictionally received between the clips '18 and the rearface of the rail17 to support the device in position on the typewriter. It will beobvious that the upper roll supporting device is secured to the carriage.of the typewriter to travel therewith. The paper roll supporting device95 further comprises forwardly extending arms 19 as clearly shown inFigure 4, the forward- 1y ext ending portions I preferably being formedintegral with the rear rail 17. The forwardly extending ortions 19 areformed integral with upstan ing arms 20 each of which is provided with a'notch 21. A spindle 22 is arranged between the arms 20 and is providedat each end with a trunnion 23 adapted to be rotatably received in thenotches 21. End flanges 24 surround. the spindle as shown, and eachflange is provided :Wlth a split collar 25' adapted to frietionally Iengage thespindle. A springmember 26 is arranged intermediate the endsof the .110

spindle 22 and may be secured thereto in any The forwardly extendingarms 19 are provided ontheir forward ends with inturned lips 28, and oneof the arms 19 is provided.

with a lip 29 extending forwardly beyond the adjacent lip 28. The lip 28adjacent the lip 29 receives a pivot pin 30, as shown in Figure 5. Aguide bar 31 and a cutter bar 32 are pivotally connected to the'pin 30,the latter being provided with a nut 33 on its outer end contacting withthe outer face of the cutter bar 32. A spacing washer 34 is preferablyarranged between the bars 31 and 32 to permit the paper sheets to-slidefreely therebetween, as I will be described. The bar 32 may be providedon its upper edge with teeth 35 to permit the paper from the roll to bereadily severed into individual sheets.

v A supporting clip 36 is secured to the lip 28 at the opposite end ofthe supporting device, asshown in detail in Figure 8. This clip ispreferably formed of a single iece of sheet metal bent to form a pair ofc annels 37 and 38 to receive the free ends of the bars 31 and 32. Thebar 32 is provided with an ofiest finger piece 39 while the bar 31 isprovided with a finger pieceflt) arranged adjacent the finger piece 39.

The spindle 22 is adapted to be received in a paper roll ll-as shown inFigure 2, this roll being made up of superimposed sheets 42 and 43. Thesheets 43 may be of any desired type of paper such as'ordinarytypewriter paper, While the sheet 42 is preferably made of relativelythin transparent paper for a purpose to be described.

The operation of the device is as follows: v

I The bars 31 and 32 are swung upwardly at their. free ends until theycontact with the lip 29 which limits the movement of the bars. The lip29 is preferably arranged in such a position that the bars will bepermitted to swing a little past vertical position so that theywillremain in upstanding position. The ends of the paper of the roll arethen inserted beneath the platen'and the latter turned manually to passthe paper around the platen. The free ends of the paper are arrangedbetween the bars 31 and 32 which act as guides for the paper. The usualtypewriting action then may be performed, the letters and othercharacters being impressed upon the outer face of the relatively heavysheet of paper 43, as will be apparent. The

paper may be perforated or otherwise marked to indicate letter lengthorsheetsof any desired length, and as a page is completely filled, thepaper may be torn by pulling one free edge of the sheet outwardly, theupper ed e of the bar 32 serving to sever the 1nd1 -vi ual sheets, aswill be apparent. Impression of the characters upon the sheets 43obviously will impress the thin sheet 42 against the duplicating mediumsurrounding the the forward face'the'reof corresponding with the face ofthe sheet 43 upon which the characters are 'printed... It will beapparent that I have provided a method of duplicating which consists in.arranging a.v pair of superimposed sheets' of paper adjacent thetypewriter platen, one of the sheets being transparent and contactingwith a duplicating medium surrounding the platen after which thecharacters are printed upon the outer face of the outerf paper sheet,thus duplicating the typed matter upon the transparent sheet. The methodand apparatus described permits the elimination of the use of carbonpaper in the usual manner which requires the placing'ofseparatesheetswith the carbon sheet therebetween. The operat on oftyping successive sheets may be'con tmuously. carried out over as manysheets as desired without the necessity of placing earbonsheetsbetween'the paper sheets.

It Wlll be apparent that the paper roll supporting device may beemployed for supplying paper for ordinary typewriting put-- poseswithout the use of the duplicating medium. The guide and cutter bars maybe employed in the manner described for guiding the sheet and permittingit to be severed into separate pages.

It is to be understood that the form of my 5 invention herewith shownand described is to be taken as a preferred example of the same andthat'various changes in the shape,

size and arrangements- 0f parts may be resorted to'without departingfrom the spirit of the invention or the scope of the subjoined claims. 5

Iclaim: K

1. An attachment for typewriters comprising a support adapted to bearranged over and secured to the paper table of a typewriter, saidsupport including .a pair of upstanding arms, a paper roll spindlerotatably supported by said arms and adapted to be arranged in a paperroll,- and a pair of guide bars pivotally supported at one end by saidsupport, said bars being spaced to permit passage therethrough of paperfrom the roll passing around said platen, and a clip carriedby saidsupport and adapted to receive the free ends of said bars.

2. A device constructed in accordance with,

whereof I afiix my signa WALTER HENRY HARBTS.

